Company lists · Data verified August 2026

Top 25 Ad tech consulting firms based in London, United Kingdom

Name: Ad tech consulting firms based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 505 companies tracked

There are 505 ad tech consulting firms headquartered in London, United Kingdom (RevenueBase, August 2026). RevenueBase tracks 9,098 professional contacts across them, including 1,491 with verified work emails and 702 with mobile numbers. London is the largest hub.

This list covers ad tech consulting firms headquartered in London, United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

505Companies

9,098Contacts tracked

1,491Verified emails

702Mobile numbers

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The 25 largest ad tech consulting firms based in London, United Kingdom

Ranked by team size

Top 25 of 505 ad tech consulting firms based in London, United Kingdom, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	OGURY	London	501-1,000	591	100
2	VERVE	London	501-1,000	443	180
3	Newbase	London	501-1,000	282	28
4	Stratagile	London	201-500	260	9
5	Expandi Group	London	201-500	155	46
6	Crimtan	London	51-200	128	94
7	Admixer	London	201-500	98	15
8	DCMN	London	51-200	94	64
9	REVX	London	51-200	88	44
10	Havas Market UK	London	51-200	80	4
11	Nest Commerce	London	51-200	69	50
12	59a	London	51-200	55	31
13	OCM Digital Media	London	51-200	54	38
14	Adserve	London	11-50	38	5
15	Aitarget Tech	London	51-200	33	10
16	Illuma	London	11-50	32	24
17	MADS	London	11-50	32	1
18	PM Dragonfly	London	11-50	29	4
19	Terrier Agency	London	11-50	28	8
20	Videology, INC	London	201-500	28	3
21	December19 B Corp	London	11-50	27	23
22	Sorenson Media	London	201-500	24	3
23	Broadlab	London	11-50	22	12
24	Naritive	London	51-200	22	3
25	Covatic	London	11-50	21	12

Showing 25 of 505 ad tech consulting firms based in London, United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,491 reachable decision-makers.

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Ad tech consulting firms based in London, United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 505 HQs

702Contacts with mobile numbers

11Emails re-verified in last 30 days

Companies by employee count

1-10

298

11-50

159

51-200

201-500

501-1,000

1,001-5,000

10001+

Ad tech consulting firms by metro in the United Kingdom

Metro	Companies
Ad tech consulting firms in London	505
Ad tech consulting firms in Manchester	37
Ad tech consulting firms in Birmingham	20
Ad tech consulting firms in Edinburgh	17
Ad tech consulting firms in Leeds	11
Ad tech consulting firms in Belfast	9
Ad tech consulting firms in Brighton	8

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “ad tech consulting firms”, with match quality audited by blind human judging, and headquartered in London, United Kingdom.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Contact records re-verify on a rolling cadence; 11 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many ad tech consulting firms are there based in London, United Kingdom?

There are 505 ad tech consulting firms headquartered in London, United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

OGURY, headquartered in London, tops this list with the largest team on record.

Which city has the most ad tech consulting firms?

London leads with 505 headquartered companies, followed by Manchester (37) and Birmingham (20).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,491 verified decision-maker contacts tracked across these 505 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph, the same data that powers RevenueBase's B2B data products and the free research portal.